New condensation product of the perimidone series



2o- 'acyl derivatives of the perimidone.

Patented Mar. 11, 1,930 I UNITED STATES PATENT OFFICE WALTER mo, 01' ornann, BUDOLI' HEIDINREICH, OF LEVEBKUSEN-ON-THE- mum, Gm, ASBIGHOBS TO GENERAL ANILINE WORKS, 1110., OF NEW YORK,

1.. 1., a. com-cannon or pnnawm m PRODUCT 01' THE PEBIIIDONE SERIES I ium-lag; imam fled Inle 1938,v Serial 10. 280,481, and in Germany December 16, 1925.

The present invention relates to new condensation products of the perimidone se-;

ries and to a process of preparing same.

When reacting upon perimidone of the 5 probable formula:

with an organic carboxylic acid halide, such as an aroylchloride, chloro ropionylehloride, etc., with or without the a dit on of an inert organic solvent at elevated temperature, compounds are obtainable which probably are When working in the presenceof inert organic solvents it may be advantageous to add anhydrous aluminiumchloride to the reaction mixture, whereby similar products are ob- 25 tained, which robab'ly are isomeric to those obtainable wit out the addition of aluminiumchloride, Now we have found that when reacting upon these com ounds with anhydrous aluminiumchlori e advantageously in the presence of a suitablegtlkali metal chloride, such as potassiumchloride or sodiumchloride, (whereby in the latter cases a temperature of about 150170 C. may be a suitable one), until samples of the melts no more change in color when dissolved in strong sulfuric acid, new condensation products are obtainable, which crystallize from suitable high organic solvents in yellow to red cr stals, di culty soluble in the usual organic 4 so vents, soluble in strong sulfuric acid with yellow to red colorations, in the most cases with a powerful yellowish-green or red flu orescence.

The following examples illustrate our in- 4 vention, without limiting it thereto:

Etvample J.1 part by weight of perimidone is boiled with 4 parts by weight of benzoylchloride for about 3-4 hours until a green solution is obtained from which, when cooled, a compound of the probable formula.

, m(cox 00K) crystallizes in ellow needles which may be recrystallized fi'om nitro-benzene. Goldenyellow needles are thus obtained which melt above 300 C. The product dissolves in strong sulfuric acid with a blueish red coloration, in caustic alkali solutions with the addition of a small amountof ethylalcohol with a yellow shade. The benzoylation as described above may also be performed in the presence of a suitable inert organic solvent,

such as nitro-benzene, o-dichlorobenzene etc. 1 part by weight of the benzoylperimidone described above is introduced at about G. into a mixture of 4 parts by weight of anhydrous aluminium chloride and one part by weight of sodiumchloride, after which the melt is heated up to about C. until samples no more change in color when dis- Probably the product corresponds to the formula: I

Example 2.--18.4 p'arts by weight of perimidone and parts by Volume of benzoylchloride are boiled for about 4 hours in 200 parts by volume of carbon disulfide with the si-When reacting upon'this product with a mixture I of anhydrous aluminiui'nchloride and sodiumchloride according to the directions given in Example 1, a product is ob tained which dissolves in strong sulfuric acid with a more red coloration and with less fluorescence than that described in Example 1.

' Example 5.37 parts by weightof per- I imidone are finely grinded with partsby densation product is obtained whiclrcrystalweight of anhydrous aluminiumchloride, suspended in 150 parts by Volume of carbon disulfid'e and to this suspension'a solution of 40 parts by weight of a-naphthoylchloride in parts by volume of carbon disulfide is I ing to the process clalmed 1n claim 1, said allowed to run in slowly. React-ion takes place simultaneously but the reaction mixture is still boiled for about 4 hours until no hydrochloric acid is any more'evolvecl.

By working up in the usual manner aroulizes from nitrobenz'ene in yellow prisms soluble in concentrated sulfuric acid with a blueish red, in piperidine with a yellow coloration.

5 parts by Weight of this condensation product are heated with a mixture of 5 parts by weight of sodium chloride and 20 parts by weight of anhydrous aluminiumchlorid'e as described i-i-n'"Example 1. A yellowish brown compound is thus obtainable, dis solving in strong sulfuric acid with a brownish red coloration and with a greenish fluores- CGHCB.

E wample 4-20 to 25 parts by weight of periniidone are slowly added into '50 parts by weight of m-nitrobenzoylchlorideand the mixture is then slowly heated up to 230 C.

until the melt solidifies. Aftercooling the reaction mass is washed with alcohol and rei-rystallizr-d from nitrobenzcne. Brown- E-l; llow crystals are thus obtained which halide,

dissolve in strong sulfuricacid with a clear violet red coloration.

By reacting upon this condensation product' with a mixture of anhydrous aluminiumchloride and sodium chloride, according to the directions given in Example 1, a yellowish brown compound is obtained soluble in strong sulfuric acid with a cherry-red colora- 7 tion and without fluorescence.

We claim:

j '75 f 1. Process, which comprises reacting upon a compound obtainable by reacting upon perimidone with an aromatic carboxylic acid 2. Process, which comprises reacting upon a compound obtainable by reacting upon with anhydrous aluminiumchloride.

perirni'donewith an aromatic carboxylic acid halide, with a mixture of anhydrous aluminiumchl'oride'and an alkali metalchloride a a temperature of about l50170 C.

3. Process, which comprises reacting upon the compound obtainable by reacting upon, I

perimidone with a chloride of an. aromatic carboxylic acid, with anhydrous aluminiumchloride. I 1

4, Process, which comprises reacting upon the compound obtainable by reacting upon perimidone with a chloride of an aromatic carboxylic acid, with a mixture of anhydrous aluminiumchlorideand an alkali metalchloride at a temperature of about 150-170 vC. 5. Process, which comprises reacting upon a compound obtainable by reacting upon perimidone with benzoylchloride, with a mixture of anhydrous aluminiumchloride and sodiumchloride at a temperature of about 150-170 C. a

was

6'. The products being obtainable accord- I products forming yellow to red crystals, difiicultly soluble in the usualorganic solvents,

soluble in strong sulfuric acid with yellow to red colorations.

7. The products being obtainablez'according to process cla med in claim 4, sald prodcultly soluble in the usual organic solvents.-

solublc instrong sulfuric acid with yellow to red colorations. I v I 8. The product oft-he probable formula:

00 co HN \N/ said product forming yellow needles, soluble in strong sulfuric acid with'a yellow coloration and with a powerful green fluorescence;

In testimony whereof we have hereunto set our hands. I

WALTER MIEG. [n s.] a RUDOLF HEIDENREICH. [1,. s.] 

